[racket] strange loops

On Tuesday, March 6, 2012, Pierpaolo Bernardi <olopierpa at gmail.com> wrote:
> Hello,
>
> I was expecting the procedure 'fa' below to run in constant memory,
> as, in my understanding, It doesn't use any non-tail recursive loops,
> it does not build any data structure, and only performs arithmetic
> operations on small integers.
>

This looks like something out of WPI programming competiton, if I'm not
mistaken.  :)
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